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| 1 | Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH_3 over commercial coal-based activated coke显示文摘Surface chemical properties of typical commercial coal-based activated cokes were characterized by Xray photoelectron spectroscopy(XPS) and acid-base titration, and then the influence of surface chemical properties on catalytic performance of activated cokes of NO reduction with NH3 was investigated in a fixed-bed quartz micro reactor at 150 ℃. The results indicate that the selective catalytic reduction(SCR) activity of activated cokes with the increase of its surface acidic sites and oxygen content,obviously, a correlation between catalytic activity and surface acidic sites content by titration has higher linearity than catalytic activity and surface oxygen content by XPS. While basic sites content by acid-base titration have not correlation with SCR activity. It has been proposed that surface basic sites content measured by titration may not be on adjacent of acidic surface oxides and then cannot form of NO2-like species, thus the reaction of reduction of NO with NH3 have been retarded. | Xie Wei Sun Zhongchao Xiong Yinwu Li Lanting Wu Tao Liang Daming | 2014 | International Journal of Mining Science and Technology2014，24，4： | 12 |
| 2 | Validation of dynamic cavitation model for unsteady cavitating flow on NACA66显示文摘Unsteady cavitating flow is extremely complicated and brings more serious damages and unignorable problems compared with steady cavitating flow.CFD has become a practical way to model cavitation;however,the popularly used full cavitation model cannot reflect the pressure-change that the bubble experiences during its life path in the highly unsteady flow like cloud cavitating.Thus a dynamic cavitation model(DCM)is proposed and it has been considered to have not only the first-order pressure effects but also zero-order effect and can provide greater insight into the physical process of bubble producing,developing and collapsing compared to the traditional cavitation model.DCM has already been validated for steady cavitating flow,and the results were reported.Furthermore,DCM is designed and supposed to be more accurate and efficient in modeling unsteady cavitating flow,which is also the purpose of this paper.The basic characteristic of the unsteady cavitating flow,such as the vapor volume fraction distribution and the evolution of pressure amplitude and frequency at different locations of the hydrofoil,are carefully studied to validate DCM.It is found that not only these characteristics mentioned above accord well with the experimental results,but also some detailed transient flow information is depicted,including the re-entrant jet flow that caused the shedding of the cavity,and the phenomenon of two-peak pressure fluctuation in the vicinity of the cavity closure in a cycle.The numerical results validate the capability of DCM for the application of modeling the complicated unsteady cavitating flow. | ZHANG XiaoBin ZHANG Wei CHEN JianYe QIU LiMin SUN DaMing | 2014 | Science China(Technological Sciences)2014，57，4： | 8 |
| 3 | Investigation on regenerator temperature inhomogeneity in Stirling-type pulse tube cooler显示文摘Regenerator is one of the most crucial components to pulse tube cooler (PTC) and thermoacoustic engine. As such regenerator is scaled up to high-power, the thermal and hydrodynamic communication transverse to the acoustic axis gets weaker and weaker. Under this condition, any unsymmetric factor could cause serious instability to the cooler or engine, which degrades their performance. Investigation has been carried out on a high-power two-stage thermal-coupled U-shape Stirling-type PTC. By detailed circumferential temperature measurements along the middle heat exchanger and second stage regen-erator, a kind of temperature inhomogeneity caused by unsymmetric pre-cooling effect of inter-stage thermal bridge was found in the lower part of the regenerator of the PTC. The temperature inhomoge-neity originating from the middle heat exchanger of the second stage regenerator amplified itself in the lower part of the regenerator and then internal streaming formed. The maximal radial temperature dif-ference could reach 30―40 K. Experimental results show that the temperature inhomogeneity intensi-fies with increased pre-cooling power and its direction can be reversed by changing the pre-cooling effect of the first stage PTC to heating effect by using external thermal load. This research shows that it is important to maintain the heating or cooling effects of heat exchangers uniform in high-power re-generative coolers and engines. | SUN DaMing MARC Dietrich GUENTER Thummes Qiu LiMin | 2009 | Chinese Science Bulletin2009，54，6： | 7 |
| 4 | Coexistence of normal, super-, and hyper-deformation in nuclei: A study with angular momentum projection method显示文摘Angular-momentum-projected energy surface calculations for A ≈ 110 nuclei indicate three distinct energy minima occurring at different angular-momenta. These correspond to normal, super-, and hy- per-deformed shapes coexisting in one nucleus. 110Pd is studied in detail, with a quantitative prediction on super- and hyper-deformed spectra by the Projected Shell Model calculation. It is found that several other neighboring nuclei in the A-110 mass region, with the neutron number around 64, also exhibit clear super- and hyper-deformation minima in the projected calculation. | SUN Yang1,2, ZHANG JingYe3, LONG GuiLu4,5 & WU ChengLi6,7 1 Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China 2 Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA 3 Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA 4 Department of Physics, Tsinghua University, Beijing 100084, China 5 Center of Nuclear Theory, Lanzhou National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China 6 Department of Physics, Xiamen University, Xiamen 361005, China 7 Department of Physics, Chung Yuan Christian University, Chung-Li, Taiwan 32023, China | 2009 | Chinese Science Bulletin2009，54，3： | 7 |
| 5 | Effect of Preparation Process on Compressive Strength and Hydrogenation Performance of Raney-Ni/Al2O3 Catalyst显示文摘In this study, Raney-Ni/Al_2O_3 catalysts were prepared from precursors which were calcined in different atmosphere(argon and air) and leached for different time. XRD, SEM, H_2-TPR and BET techniques were introduced to characterize the catalysts, and hydrogenation of unsaturated hydrocarbons, including vinyltoluene, dicyclopentadiene and indene, was used as probe reaction to evaluate the catalytic hydrogenation performance of the catalysts. The results demonstrated that the calcination atmosphere had noticeable effects on the compressive strength and hydrogenation performance of Raney-Ni/Al_2O_3. The catalyst calcined in argon exhibited better compressive strength and catalytic performance than the one calcined in air. The compressive strength and activity stability of catalyst were also determined by the leaching time. A too longer leaching time was not conducive to improving the compressive strength and catalytic performance of catalysts. When the precursor calcined in argon was treated in a 15%(by wt.) sodium hydroxide solution at 343 K for 5 h, a catalyst with higher compressive strength(at 26.10 N/mm) was obtained and the conversion of vinyltoluene, dicyclopentadiene(DCPD), and indene could amount to more than 87.5%, 99% and even 100%, respectively, under the reaction conditions covering a temperature of 493 K, a hydrogen pressure of 2.0 MPa, a LSHV of 3.0 h^(-1), and a hydrogen/oil ratio of 200:1. | Luo Guohua Wang Yanli Sun Daming Xu Xin Jin Haibo | 2017 | China Petroleum Processing & Petrochemical Technology2017，19，2： | 5 |
| 6 | Feed intake prediction model for group fish using the MEA-BP neural network in intensive aquaculture显示文摘In aquaculture,the accurate prediction of feed intake for group fish is considered to be crucial to any feeding system.Previous studies mainly used mathematical statistics to establish the mapping relationship between feed intake and influencing factors.The result was easily influenced by subjective experience.To solve the above issues,this paper proposed a feed intake prediction model for group fish using the back-propagation neural network(BPNN)and mind evolutionary algorithm(MEA).Firstly,four factors,including water temperature,dissolved oxygen,the average fish weight and the number of fish were selected as the input of the BPNN model.Secondly,the initial weight and threshold of the BPNN were optimized by the MEA to improve the matching precision.Finally,the prediction model was achieved after training.Experimental results showed that the correlation coefficient between the predicted and measured values reached 0.96.And the root mean squared error,mean square error,mean absolute error,mean absolute percent error of the model was 6.89,47.53,6.17 and 0.04,respectively.In addition,the proposed method also had the better nonlinear fitting ability than BPNN and GA-BP.By using an intelligent optimization algorithm,the mapping relationship between fish intake and environmental factors was automatically established,thus avoiding the subjectivity of traditional methods.Therefore,it can lay a theoretical foundation for the development of intelligent feeding equipment and meet the needs of the smart fishery. | Lan Chen Xinting Yang Chuanheng Sun Yizhong Wang Daming Xu Chao Zhou | 2020 | Information Processing in Agriculture2020，7，2： | 5 |
| 7 | Source-sink System and Sedimentary Model of Progradational Fan Delta Controlled by Restricted Ancient Gully:An Example in the Enping Formation in the Southern Baiyun Sag,Pearl River Mouth Basin,Northern South China Sea显示文摘Tectonic activity occurred during the depositional period of the Enping Formation in the southern Baiyun Sag in the Pearl River Mouth Basin,with a series of synsedimentary faults and a set of large fan delta reservoir bodies developing.There is no data from drilling,cores,etc.for this area,so this paper applies three-dimensional seismic data to study the structural style of the steep slope zone,the seismic facies characteristics of fan deltas,and the source-sink system and sedimentary model of the Enping Formation.The control action of tectonic activity on fan deltaic sedimentary systems is studied by combining interpretation of fault systems,dissection of structural styles,seismic reflection structure,seismic facies geometry,and seismic attribute analysis,together with theoretical analysis of the source-sink deposition process.The Baiyun Sag has experienced tectonic activity since the Eocene,and a series of synsedimentary faults are developed in the southern steep slope zone.Under the common control of multiple large synsedimentary faults,a large ancient gully formed in the steep slope zone in the south,which gradually widened from south to north.The uplift area in the southern part of the sag was exposed for a long time during the deposition of the Enping Formation and consequently suffered weathering and erosion.The resulting sediments were transported through a system of provenance channels composed of slopes and an ancient gully to the depression area,where they were deposited and eventually converged to form a large fan delta.The fan delta presents the overall characteristics of NS strong wedge reflection and EW strong domal reflection—thick in the middle part and thin in the wings.It displays a lobe-shaped distribution on the plane,with the fan root pointing to the south slope.According to differences in reflection intensity from bottom to top,it can be subdivided into three stages of progradational sedimentary bodies—the southern uplift and denudation zone,the large ancient gully,and the fan delta—which together constitute a complete source-sink system.This represents a sedimentary model of progradational fan delta under the overall joint control of the re stricted ancient gully and syndepositional faults. | FENG Congjun YAO Xingzong YANG Haizhang LI Daming SUN Mengsi | 2021 | Acta Geologica Sinica(English Edition)2021，95，1： | 4 |
| 8 | Surface-defective FeS2 for electrochemical NH3 production under ambient conditions显示文摘In the viewpoint of ammonia economy,electrochemical N2 reduction reaction(NRR)under mild condition is a very promising approach for sustainable development.By virtue of robust activity and low cost,transition-metalbased materials become one kind of the most attractive electrocatalysts in realizing ammonia synthesis to the industrial level.However,the investigation related to NRR electrocatalysts still mainly rely on costly substance or fabrication process,which greatly restrict their large-scale applications.In this work,a simple fabricated FeS2 electrode is adopted as NRR catalysts.The abundant surface defects due to the existence of Cr element,as well as the synergistic effect between FeS2 crystal planes provided excellent electrocatalytic performance with a high NH3 yield rate(11.5μg h^-1mg^-1 Fe)and Faradaic efficiency(14.6%)at-0.2 V vs.reversible hydrogen electrode(RHE)toward NRR under ambient conditions.The superior catalytic performance of such non-precious metal catalysts would strongly promote the application of NRR process industrially. | Daming Feng Xu Zhang Ying Sun Tianyi Ma | 2020 | Nano Materials Science2020，2，2： | 3 |
| 9 | Optical and electrical properties of Ag-MgF2 cermet films 显示文摘 | Sun Zhaoqi Sun Daming Ruan T N | 2002 | Vacuum2002，68，2： | 3 |
| 10 | Study on the SiN_x/Al rear reflectance performance of crystalline silicon solar cells显示文摘The performance of internal rear surface reflectance of crystalline silicon solar cells is becoming more and more important with the decrease of thickness of the silicon wafers. In this paper PC1D was used to simulate the correlations between the rear surface reflectance and the electrical as well as optical properties of the solar cells. The results showed that the short circuit current, open circuit voltage and quantum efficiency were all enhanced with the increase of the rear reflectance. When the rear reflectance increased from 60% to 100%, the short circuit current, open circuit voltage and maximum output power were improved by about 0.128 A, 0.007 V, and 0.066 W, respectively. The internal quantum efficiency was improved by 39.9%, the external quantum increased by 17.4%, and the efficiency of the solar cells was enhanced by 0.4% at 1100 nm wavelength. The screen-printing was selected to prepare SiNx/Al reflector, and experimental results showed that the SiNx/Al reflector has desired characteristic of internal rear reflectance, with the reflectivity of 15% higher than that of conventional aluminum BSF at 1100 nm wavelength. | LIANG ZongCun, CHEN DaMing, ZHU YanBin & SHEN Hui Institute for Solar Energy Systems, State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China | 2010 | Science China(Technological Sciences)2010，53，12： | 2 |
| 11 | Bismuth-Based Free-Standing Electrodes for Ambient-Condition Ammonia Production in Neutral Media显示文摘Electrocatalytic nitrogen reduction reaction is a carbon-free and energy-saving strategy for efficient synthesis of ammonia under ambient conditions.Here,we report the synthesis of nanosized Bi2O3 particles grown on functionalized exfoliated graphene(Bi2O3/FEG)via a facile electrochemical deposition method.The obtained free-standing Bi2O3/FEG achieves a high Faradaic efficiency of 11.2%and a large NH3 yield of 4.21±0.14μgNH3 h^-1 cm^-2 at-0.5 V versus reversible hydrogen electrode in 0.1 M Na2SO4,better than that in the strong acidic and basic media.Benefiting from its strong interaction of Bi 6p band with the N2p orbitals,binder-free characteristic,and facile electron transfer,Bi2O3/FEG achieves superior catalytic performance and excellent long-term stability as compared with most of the previous reported catalysts.This study is significant to design low-cost,high-efficient Bi-based electrocatalysts for electrochemical ammonia synthesis. | Ying Sun Zizhao Deng Xi‑Ming Song Hui Li Zihang Huang Qin Zhao Daming Feng Wei Zhang Zhaoqing Liu Tianyi Ma | 2020 | Nano-Micro Letters2020，12，10： | 2 |
| 12 | Study on the onset temperature of a standing-wave thermoacoustic engine based on circuit network theory显示文摘Onset mechanism is one of the most fundamental issues in thermoacoustic field.However,the onset conditions and the phenomena happening in the onset process have not been well explained theoretically.In this paper,a novel model based on the circuit network analogy is proposed to predict the onset temperature of a standing-wave thermoacoustic engine.The activity and instability criteria are proposed to be the onset criteria in the model.The influences of the porosity of the heat exchanger and the stack,and the length of the resonant tube on the onset temperature are analyzed.The calculated results are in agreement with the experimental results,which indicates that the activity and instability criteria can be used to predict the onset conditions of a thermoacoustic engine. | QIU LiMin LAI BiHui ZHAO YiTao SUN DaMing ZHANG XueJun LI YanFeng | 2012 | Science China(Technological Sciences)2012，55，10： | 2 |
| 13 | Transcriptomic analysis reveals the molecular mechanisms of rumen wall morphological and functional development induced by different solid diet introduction in a lamb model显示文摘Background:This study aimed to elucidate the molecular mechanisms of solid diet introduction initiating the cellular growth and maturation of rumen tissues and characterize the shared and unique biological processes upon different solid diet regimes.Methods:Twenty-four Hu lambs were randomly allocated to three groups fed following diets:goat milk powder only(M,n=8),goat milk powder+alfalfa hay(MH,n=8),and goat milk powder+concentrate starter(MC,n=8).At 42 days of age,the lambs were slaughtered.Ruminal fluid sample was collected for analysis of concentration of volatile fatty acid(VFA)and microbial crude protein(MCP).The sample of the rumen wall from the ventral sac was collected for analysis of rumen papilla morphology and transcriptomics.Results:Compared with the M group,MH and MC group had a higher concentration of VFA,MCP,rumen weight,and rumen papilla area.The transcriptomic results of rumen wall showed that there were 312 shared differentially expressed genes(DEGs)between in“MH vs.M”and“MC vs.M”,and 232 or 796 unique DEGs observed in“MH vs.M”or“MC vs.M”,respectively.The shared DEGs were most enriched in VFA absorption and metabolism,such as peroxisome proliferator-activated receptor(PPAR)signaling pathway,butanoate metabolism,and synthesis and degradation of ketone bodies.Additionally,a weighted gene co-expression network analysis identified M16(2,052 genes)and M18(579 genes)modules were positively correlated with VFA and rumen wall morphology.The M16 module was mainly related to metabolism pathway,while the M18 module was mainly associated with signaling transport.Moreover,hay specifically depressed expression of genes involved in cytokine production,immune response,and immunocyte activation,and concentrate starter mainly altered nutrient transport and metabolism,especially ion transport,amino acid,and fatty acid metabolism.Conclusions:The energy production during VFA metabolism may drive the rumen wall development directly.The hay introduction facilitated establishment of immune function,while the concentrate starter enhanced nutrient transport and metabolism,which are important biological processes required for rumen development. | Daming Sun Yuyang Yin Changzheng Guo Lixiang Liu Shengyong Mao Weiyun Zhu Junhua Liu | 2021 | Journal of Animal Science and Biotechnology2021，12，3： | 2 |
| 14 | Orientation effects on natural convection heat dissipation of rectangular fin heat sinks mounted on LEDs显示文摘 | Qie Shen Daming Sun Ya Xu Tao Jin Xu Zhao | 2014 | International Journal of Heat and Mass Transfer2014，，： | 1 |
| 15 | Adhering wear mechanism of cemented carbide cutter in the interrallic cutting of stainless steel显示文摘 | Sun Fenglian Li Zhenjia Jiang Daming | 1998 | Wear1998，214，： | 1 |
| 16 | Investigation on traveling wave thermoacoustic heat engine with high pressure amplitude 显示文摘 | Daming Sun Limin Qiuet | 2005 | Energy Conversion and Management2005，46，1： | 1 |
| 17 | Study on Ocular Torsion of V Patterns Strabismus显示文摘Purpose: To investigate the ocular torsion of V patterns.Methods:Twenty-two in hospital V patterns patients underwent bilateral inferior obliquemuscles myectomy for inferior oblique overacting and hortizon recti underwent recessresection procedure to correct hortizon devation. Objective cycloposition was assessed by fundus photograph before and 7 days after surgery in all cases. The photographs was stored in computer, and the disc-fovea angle was measured by means of drawing picture software. As well as the deviation, oblique muscle function was recorded before and after surgery.Result: Seventeen cases were bilateral ocular excyclotropia, 4 cases were monocular excyclotropia and one case was normal.The disc-fovea angle of right eyes and left eyes before operation is 15.67°+5.72° and 16.59°+6.69°.The comparisons among V patterns and normal average showed significant differences ( P < 0.001). The disc-fovea angle of right eyes and left eyes after operation is 5.24°+5.87° and 7.17°+5.40°. There is no statistic difference between normal average( P > 0.5).The deviation between up-and down 25° is 23.1+6.8 before surgery, as well as the one is 2.0±2.25 one week postoperatively.All cases have bilateral inferior oblique overaction, and diminished but one case still has unilateral moderate overaction 7 days after surgery.Conclusion:There is objective cyclotropia in case of V patterns, and the objective torsion is normal after weakening overacted inferior oblique muscles. | Xinping Yu, Guanghuan Mai, Huanyun Yu, Daming Deng Xiaoming Lin, Jingchang Chen, Heping Wu Zhongshan Ophthalmic Center, Sun Yat-sen University Guangzhou 510060, China | 2003 | Eye Science2003，19，3： | 1 |
| 18 | Investigation on Traveling Wave Thermoacoustic Heat Engine with High Pressure Amplitude显示文摘 | Sun Daming Qiu Limin ZhangWu | 2005 | Energy Conversion and Management2005，46，2： | 1 |
| 19 | Regulation of APC^cdh1 E3 ligase activity by the Fbw7/cyclin E signaling axis contributes to the tumor suppressor function of Fbw7显示文摘Fbw7 和 Cdh1 分别地是 SCF 类型和 APC 类型 E3 ubiquitin ligases 的底层识别子单元。新兴的证据由为破坏指向 oncoproteins 作为肿瘤 suppressors 正在建议那 Fbw7 和 Cdh1 功能。Fbw7 的损失,然而并非 Cdh1,经常在各种各样的人的肿瘤被观察。然而, Fbw7 怎么机械学地作为肿瘤 suppressor 工作并且是否在 Fbw7 和 Cdh1 之间有发信号的串音,仍然保持大部分未知。这里,我们报导那 Fbw7 缺乏的房间不仅显示 SCF Fbw7 底层包括 cyclin E,而且增加了各种各样的 APC Cdh1 底层。我们进一步把 cyclin E 定义为 Fbw7 由管理 APC Cdh1 活动,在 Fbw7 缺乏的房间的 cyclin E 的弄空导致 APC Cdh1 底层到比得上那些的层次在野类型(WT ) 房间。相反地, cyclin E 的宫外的表示概括异常 APC 在 Fbw7 缺乏的房间观察的 Cdh1 底层表示。更重要地,对 Cdk2/cyclin 电子 mediated phosphorylation 抵抗的 4A-Cdh1,然而并非 WT-Cdh1,颠倒了各种各样的 APC 在 Fbw7 缺乏的房间的 Cdh1 底层。4A-Cdh1 的 Overexpression 也导致了延迟的房间生长并且减少抛锚无关的殖民地形成。总的来说,我们识别了 Fbw7 以一种 cyclin 电子依赖者方式由管理 Cdh1 活动的新奇规章的机制。作为结果, Fbw7 的损失能在两 SCF Fbw7 和 APC Cdh1 底层。我们的学习提供 Fbw7 的肿瘤 suppressor 功能的更好的理解,并且建议禁止者能为治疗 Fbw7 缺乏的肿瘤作为有效治疗学的代理人服务的那 Cdk2/cyclin E。 | Alan WLau Hiroyuki Inuzuka Hidefumi Fukushima LixinWan Pengda Liu Daming Gao Yi Sun Wenyi Wei | 2013 | Cell Research2013，23，7： | 1 |
| 20 | Preparation and microstructure of nano-crystalline grain Ag-MgF2 cermet film 显示文摘 | Sun Zhaoqi Sun Daming Li Aixia | 1998 | Chin Phys Lett1998，16，5： | 1 |
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